The changes here are heterogeneous:
- Include stuff that is not available (other test has included it).
Sometimes local to a unit test, others in setupBeforeClass() or
globally, ... depends on every case.
- Rename some tests (namespaces, test name, ...) towards getting it
running.
- Amend small bits here and there.
Important note: I've left any "cosmetic" warning out from the
changes, only a few errors (like long array syntax) have been fixed.
This test cannot be made to work while there are no hooks to test.
When we add our first hooks, we can add these tests back and provide a
fake implementation for them in an isolated test run.